CN102562712A - Engineering machinery, pumping mechanism thereof and pumping hydraulic oil replenishing system - Google Patents
Engineering machinery, pumping mechanism thereof and pumping hydraulic oil replenishing system Download PDFInfo
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- CN102562712A CN102562712A CN2012100366979A CN201210036697A CN102562712A CN 102562712 A CN102562712 A CN 102562712A CN 2012100366979 A CN2012100366979 A CN 2012100366979A CN 201210036697 A CN201210036697 A CN 201210036697A CN 102562712 A CN102562712 A CN 102562712A
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Abstract
The invention discloses a pumping hydraulic oil replenishing system, which is provided with rod cavity oil replenishing openings, an oil replenishing reversing valve, a controller and a stop point position detecting element. The rod cavity oil replenishing openings are arranged at non-piston-stroke positions of an oil cylinder and are connected with or disconnected form an oil inlet channel or an oil return channel via the oil replenishing reversing valve; throttling structures are arranged on a passage between the oil replenishing reversing valve and the oil inlet channel and a passage between the oil replenishing reversing valve and the oil return channel; and the stop point position detecting element is connected with the controller, the controller sets oil replenishing time, and the oil replenishing reversing valve is controlled to be switched to a connection position after at least one piston runs to a stop point position according to stop point position detecting information, and is switched to a disconnection position after the oil replenishing time. By the aid of the throttling structures of the pumping hydraulic oil replenishing system, a hydraulic half bridge is built to adjust pressure of a connection cavity, and oil replenishing, oil drainage and oil changing of hydraulic oil of the connection cavity are completed; the oil replenishing openings are arranged at the non-piston-stroke positions, so that pistons cannot scrape the oil replenishing openings in a running process, abrasion is reduced effectively, and the service life is prolonged. The invention further discloses engineering machinery and a pumping mechanism thereof.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly a kind of pumps hydraulic oil-supplementing system.The invention still further relates to a kind of pumping mechanism and engineering machinery that comprises the hydraulic pressure oil-supplementing system.
Background technique
In the concrete pumping mechanism; Have two oil cylinders and two concrete cylinders; The shared piston rod of one oil cylinder and a concrete cylinder; Two oil cylinder inner carriers are done the opposite motion of stroke, thereby the concrete piston that drives in two concrete cylinders is done the opposite motion of stroke, and then two concrete cylinders are accomplished the action that concrete replaces inspiration and pumps.Certainly, this kind structural type also can be used for other media of pumping.
For realizing that two oil cylinders make the stroke reverse motions, two rodless cavities of two oil cylinders are connected or two rod chambers are connected, promptly the flow path of hydraulic oil for advance from a cylinder rod chamber, another cylinder rod chamber goes out, two rodless cavities form communicated cavity; Or from an oil cylinder rodless cavity advance, another oil cylinder rodless cavity goes out, two rod chambers form communicated cavity.Under the certain situation of pressure oil pressure, when the rod chamber oil-feed, since the existence of piston rod, piston stress area less (with respect to rodless cavity), then pressure is less, and this moment, the mode of operation of hydraulic system was a low-voltage; Relatively, when the rodless cavity oil-feed, the mode of operation of hydraulic system is a high pressure mode.
Because there is hydraulic fluid leak at work in hydraulic system, the stroke of oil cylinder can be inconsistent because of the hydraulic fluid leak in the communicated cavity, therefore need carry out repairing.See also Fig. 1 and Fig. 2, Fig. 1 is the hydraulic diagram of existing technology mesolow pattern repairing scheme; Fig. 2 is the hydraulic diagram of existing technology mesohigh pattern repairing scheme.
In Fig. 1; With Fig. 1 orientation is the visual angle; After the hydraulic oil in the communicated cavity produces leakage; When the first piston 111 of first oil cylinder 11 moved to final position, rodless cavity lower end (bottom dead center position), second piston 121 of second oil cylinder 12 can't move to the final position, upper end (top dead center position) of rod chamber because of the leakage of hydraulic oil.In order to solve the inconsistent problem of stroke that two oil cylinders cause because of leakage, available technology adopting the repairing scheme.
As depicted in figs. 1 and 2, be respectively arranged with repairing mouth a1, b2 in the side of the lower end of two oil cylinders, the side of upper end is provided with repairing mouth b1, a2 respectively.The top and bottom of oil cylinder are mended oil port and are equipped with the repairing oil circuit, and the repairing oil circuit is made up of one-way valve and throttle orifice.In conjunction with Fig. 1 and Fig. 2, first oil cylinder, 11 lower ends and second oil cylinder, 12 lower ends are equipped with one-way valve 131, first segment discharge orifice 151; The benefit oil port of first oil cylinder, 11 upper ends and second oil cylinder, 12 upper ends is equipped with one-way valve 132, second throttle orifice 152 (for ease of understanding; Fig. 1 and Fig. 2 take the omission mode; Fig. 1 and Fig. 2 are incorporated in the scheme that one is an existing technology, and promptly the upper and lower end of arbitrary oil cylinder is equipped with repairing mouth and corresponding repairing oil circuit).
In conjunction with Fig. 1 and Fig. 2; Low-voltage: hydraulic oil advances from the rod chamber of first oil cylinder 11, and the rod chamber of second oil cylinder 12 goes out, when the hydraulic oil in the no bar communicated cavity is very few; The first piston 111 of first oil cylinder 11 moves between the two repairing mouth a1 of lower end; Some one-way valve 131 of flowing through of the pressure oil of the rod chamber of first oil cylinder 11, first segment discharge orifice 151 get into its rodless cavity, flow into second oil cylinder, 12 rodless cavities from its rodless cavity again, are reached for the purpose of communicated cavity repairing; When hydraulic oil was too much in the no bar communicated cavity, hydraulic oil unnecessary in the communicated cavity can get into the rod chamber of second oil cylinder 12 through one-way valve 132, second throttle orifice 152 of second oil cylinder, 12 upper ends again, is back to fuel tank again, realizes changing oil.The repairing mode of second oil cylinder 12 is consistent with the repairing mode of first oil cylinder 11.High pressure mode is identical with the principle of low-voltage, repeats no more.
Above-mentioned repairing mode need be offered the repairing mouth on the cylinder barrel of oil cylinder; Can be referring to Fig. 3; Fig. 3 is the structural representation of oil cylinder in the existing technology, and an end of first oil cylinder, 11 cylinder barrels is provided with repairing mouth a1 at the piston stroke place, and the other end is provided with repairing mouth b1 at the piston stroke place.Like this,, might be caused piston to reduce working life, influence the performance of oil cylinder by scratch when piston during through the repairing mouth; And the repairing mouth offer the intensity that has also reduced oil cylinder.
In view of this, how improving hydraulic pressure oil-supplementing system in the pumping mechanism, under the prerequisite that satisfies the repairing function, do not influence the working life of oil cylinder piston, is those skilled in the art's technical issues that need to address.
Summary of the invention
The object of the invention is for providing a kind of pumps hydraulic oil-supplementing system; Repairing mouth in this pumps hydraulic oil-supplementing system is located at the non-piston stroke place of oil cylinder; When effectively realizing repairing; Avoid the friction between piston and the repairing mouth, the working life that can improve piston, and can improve the intensity of oil cylinder.Another object of the present invention is for providing a kind of pumping mechanism and engineering machinery.
For reaching first purpose of the present invention, the present invention provides a kind of pumps hydraulic oil-supplementing system, has two oil cylinders that can under rod chamber connection pattern, work, and two said oil cylinders all have two dead-centre positions of piston; Also have:
Non-piston stroke place corresponding with rod chamber at least one said oil cylinder is provided with rod chamber repairing mouth;
The repairing selector valve, said rod chamber repairing mouth is through said repairing selector valve and in-line and oil circuit realization break-make; Be equipped with throttle structure on said in-line and the said oil circuit;
Controller and connected dead-centre position Detecting element, said dead-centre position Detecting element detect the signal of piston arrives one dead-centre position of an oil cylinder at least; Said controller is set the repairing time; And according to the testing signal of dead-centre position Detecting element; Control said repairing selector valve switching position after at least one piston moves to dead-centre position; So that said rod chamber repairing mouth is communicated with in-line and oil circuit, switching position after the repairing time is so that said rod chamber repairing mouth and in-line and oil circuit disconnection.
Preferably, be equipped with said rod chamber repairing mouth on the two said oil cylinders, two said rod chamber repairing mouths are communicated with in-line and oil circuit respectively through said repairing selector valve or break off.
Preferably, said repairing selector valve is a three position four-way directional control valve.
Preferably, four of said repairing selector valve oil ports are equipped with throttle structure.
For reaching above-mentioned purpose of the present invention, the present invention also provides a kind of pumps hydraulic oil-supplementing system, has two oil cylinders that can under rodless cavity connection pattern, work, and two said oil cylinders all have two dead-centre positions of piston; Also have:
Non-piston stroke place corresponding with rodless cavity at least one said oil cylinder is provided with rodless cavity repairing mouth;
The repairing selector valve, said rodless cavity repairing mouth is through said repairing selector valve and in-line and oil circuit realization break-make; Be equipped with throttle structure on said in-line and the said oil circuit;
Controller and connected dead-centre position Detecting element, said dead-centre position Detecting element detect the signal of piston arrives one dead-centre position of an oil cylinder at least; Said controller is set the repairing time; And according to the testing signal of dead-centre position Detecting element; Said repairing selector valve switching position after at least one piston moves to dead-centre position that control is corresponding; So that said rodless cavity repairing mouth is communicated with in-line and oil circuit, switching position after the repairing time is so that said rodless cavity repairing mouth and in-line and oil circuit disconnection.
Preferably, be equipped with said rodless cavity repairing mouth on the two said oil cylinders, two said rodless cavity repairing mouths are communicated with in-line and oil circuit respectively through said repairing selector valve or break off.
Preferably, said repairing selector valve is a three position four-way directional control valve.
Preferably, four of said repairing selector valve oil ports are equipped with throttle structure.
Above-mentioned two kinds of pumps hydraulic oil-supplementing systems that this invention provides; Regulate the pressure of communicated cavity through the in-line that is equipped with throttle structure, the hydraulic pressure half-bridge of oil circuit foundation; Carry out communicated cavity deep fat and the exchange of fuel tank cold oil in the time of with the realization normal commutation; And compensate the inconsistent problem of two oil cylinder strokes that the variation of communicated cavity oil mass is caused automatically, promptly accomplish repairing, the draining of communicated cavity hydraulic oil and the process of changing oil.On this basis, this invention is located at the non-piston stroke place on the oil cylinder with the repairing mouth, and then piston is in running; Can not produce scraping with the repairing mouth, the operation of piston is more smooth and easy, compared to existing technology; Wearing and tearing are able to effective reduction, are able to working life prolong.In addition, the present invention only needs the signal of piston arrives one dead-centre position of any oil cylinder of detection in the repairing process, control comparatively simple.
For reaching another object of the present invention; The present invention also provides a kind of pumping mechanism and engineering machinery; Pumping mechanism has the pumps hydraulic system; With pumping cylinder by said pumps hydraulic system drive, be provided with like above-mentioned each described pumps hydraulic oil-supplementing system in the said pumps hydraulic system, engineering machinery has this pumping mechanism.Because above-mentioned pumps hydraulic oil-supplementing system has above-mentioned technique effect, the pumping mechanism engineering machinery with this pumps hydraulic oil-supplementing system also has identical technique effect.
Description of drawings
Fig. 1 is the hydraulic diagram of existing technology mesolow pattern repairing scheme;
Fig. 2 is the hydraulic diagram of existing technology mesohigh pattern repairing scheme;
Fig. 3 is the structural representation of oil cylinder in the existing technology;
Fig. 4 is the structural representation of the pumps hydraulic oil-supplementing system under a kind of rodless cavity connection pattern provided by the present invention;
Fig. 5 is the structural representation of the pumps hydraulic oil-supplementing system under the another kind of rodless cavity connection pattern provided by the present invention;
Fig. 6 is the structural representation of the pumps hydraulic oil-supplementing system under a kind of rod chamber connection pattern provided by the present invention.
Fig. 7 is a hydraulic pressure half-bridge schematic diagram.
Embodiment
Core of the present invention is for providing a kind of pumps hydraulic oil-supplementing system; The non-piston stroke place that repairing mouth in this pumps hydraulic oil-supplementing system is located at oil cylinder when effectively realizing repairing, avoids the friction of piston and repairing mouth; The working life of piston can be improved, and the intensity of oil cylinder can be improved.Another core of the present invention is for providing a kind of pumping mechanism.
In order to make those skilled in the art understand technological scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 4 to Fig. 6, Fig. 4 is the structural representation that a kind of rodless cavity provided by the present invention is communicated with pattern pumps hydraulic oil-supplementing system; Fig. 5 is the structural representation that another kind of rodless cavity provided by the present invention is communicated with pattern pumps hydraulic oil-supplementing system; Fig. 6 is the structural representation that a kind of rod chamber provided by the present invention is communicated with pattern pumps hydraulic oil-supplementing system.Need to prove; Fig. 4 and Fig. 6 split the statement rodless cavity with hydraulic system and are communicated with pattern and rod chamber connection pattern; Be mainly and be convenient to understand intuitively, the two is combined into and both is applicable to the work of rodless cavity connection pattern, is applicable to that also rod chamber is communicated with the pumps hydraulic oil-supplementing system of pattern work.
Identical with existing technology, the pumps hydraulic oil-supplementing system in this embodiment has two oil cylinders; Be first oil cylinder 21 shown in Fig. 4 and second oil cylinder 22; Have the first piston 211 and second piston 221 respectively, and two oil cylinders all have two dead-centre positions of piston, promptly piston moves to the final position at oil cylinder two ends; Distance between two dead-centre positions has determined the stroke of piston; For ease of describing, be that the visual angle describes with the orientation of Fig. 4, first oil cylinder 21 and second oil cylinder 22 all have top dead center position and bottom dead center position.What Fig. 4 showed is rodless cavity connection pattern, rod chamber oil-feed, oil return, and the rodless cavity of two oil cylinders is communicated with the formation communicated cavity; What Fig. 6 showed is rod chamber connection pattern, rodless cavity oil-feed, oil return, and two rod chambers are communicated with the formation communicated cavity.
Hydraulic pressure oil-supplementing system under the rodless cavity connection pattern has two repairing mouths; Be respectively the first rodless cavity repairing mouth 213, the second rodless cavity repairing mouth 223; Hydraulic pressure oil-supplementing system under the rod chamber connection pattern also has two repairing mouths; Be respectively the first rod chamber repairing mouth 214 and the second rod chamber repairing mouth 224 and (the first rodless cavity repairing mouth 213 and the second rodless cavity repairing mouth 223 only be shown, the communicated cavity of corresponding two oil cylinders under rodless cavity connection pattern, i.e. rodless cavity repairing mouth among Fig. 4; Fig. 6 shows the first rod chamber repairing mouth 214 and the second rod chamber repairing mouth 224, the communicated cavity of corresponding two oil cylinders under rod chamber connection pattern, i.e. rod chamber repairing mouth).When hydraulic system is in rodless cavity connection pattern (rod chamber oil-feed or oil return); The first rodless cavity repairing mouth 213 and 223 work of the second rodless cavity repairing mouth; When hydraulic system is in rod chamber connection pattern (rodless cavity oil-feed or oil return), the first rod chamber repairing mouth 214 and 224 work of the second rod chamber repairing mouth; The first rodless cavity repairing mouth 213 and the first rod chamber repairing mouth 214 are located at respectively on first oil cylinder 21 and rodless cavity, non-piston stroke place that rod chamber is corresponding, and the second rodless cavity repairing mouth 223 and the second rod chamber repairing mouth 224 are located at respectively on second oil cylinder 22 and rodless cavity, non-piston stroke place that rod chamber is corresponding.Non-piston stroke place described herein refers on the oil cylinder not and piston side face position contacting, such as, the cylinder barrel part between cylinder barrel part, bottom dead center position and the lower end cap between top dead center position and the upper end cap, or the end cap part of oil cylinder.Can know by foregoing; The first rodless cavity repairing mouth 213, the second rodless cavity repairing mouth 223 are respectively the rodless cavity repairing mouth of first oil cylinder 21 and second oil cylinder 22; The first rod chamber repairing mouth 214 and the second rod chamber repairing mouth 224 are respectively the rod chamber repairing mouth of first oil cylinder 21 and second oil cylinder 22, and the rod chamber repairing mouth of each oil cylinder and rodless cavity repairing mouth are one in this mode of execution, in fact; Also can be more than one; Certainly, according to actual needs, can meet the demands according to this mode of execution setting.
Like Fig. 4 and shown in Figure 5, under the rodless cavity connection pattern, the rod chamber of first oil cylinder 21 and second oil cylinder 22 is communicated with oil pump and fuel tank through first main reversing valve 231.Be provided with the first repairing selector valve 241 in this pumps hydraulic oil-supplementing system; The first rodless cavity repairing mouth 213 and the second rodless cavity repairing mouth, 223, the first rodless cavity repairing mouths 213 and the second rodless cavity repairing mouth 223 are communicated with or disconnection in-line or oil circuit through the first repairing selector valve 241.As shown in Figure 6, under the rod chamber connection pattern, the rod chamber of first oil cylinder 21 and second oil cylinder 22 is communicated with oil pump and fuel tank through second main reversing valve 232.This pumps hydraulic oil-supplementing system is provided with the second repairing selector valve 242; The Placement of the first rod chamber repairing mouth 214, the second rod chamber repairing mouth 224 and the second repairing selector valve 242 is identical with the Placement of the first rodless cavity repairing mouth 213, the second rodless cavity repairing mouth 223, the first repairing selector valve 241.Be equipped with throttle structure on the path of the first repairing selector valve 241 and in-line, oil circuit, throttle structure can be throttle orifice, the first segment discharge orifice Φ Dp1 as shown in Figure 4 and the second throttle orifice Φ Dt1.Please combine Fig. 7 to understand, Fig. 7 is a hydraulic pressure half-bridge schematic diagram.Throttle orifice Φ Dp and throttle orifice Φ Dt lay respectively on in-line and the oil circuit; Pr representes the pressure of connection place between in-line and the oil circuit; Px is an in-line pressure; The setting of throttle orifice makes this structure form the hydraulic pressure half-bridge; Make Pr satisfy following formula:
(wherein, D1, D2 represent the pore size of throttle orifice Φ Dp and throttle orifice Φ Dt respectively), through regulating the size of throttle orifice Φ Dp and throttle orifice Φ Dt; Make Pr and Px form certain ratio variation relation, thereby Pr is chosen in the suitable scope.The communicated cavity of two oil cylinders inserts in the hydraulic pressure half-bridge in the given time; The pressure of communicated cavity and Pr form transient equiliblium; Thereby when being implemented in two pistons of two oil cylinders at least one and arriving stop, communicated cavity is realized under suitable pressure: repairing when communicated cavity fluid is very few, draining when communicated cavity fluid is too much, change oil when communicated cavity fluid is neither too much nor too little.Among Fig. 6, be equipped with throttle structure on the path of the second repairing selector valve 242 and in-line, oil circuit, throttle structure also can be throttle orifice, and the 3rd throttle orifice Φ Dp2 and the 4th throttle orifice Φ Dt2 and in-line, oil circuit can be set up the hydraulic pressure half-bridge equally among the figure.Can throttle orifice be located at the oil port of repairing selector valve, easy to use and adjusting.
Be provided with a throttle orifice among Fig. 4 on in-line and the oil circuit respectively; Be the first segment discharge orifice Φ Dp1 and the second throttle orifice Φ Dt1; Being located at the P mouth (filler opening) and the T mouth (return opening) of the first repairing selector valve 241 respectively locates; In fact, also can throttle orifice also be set at the A mouth and the B mouth place that are communicated with two rodless cavity repairing mouths, promptly four oil ports at the first repairing selector valve 241 all are provided with throttle orifice.As shown in Figure 5, be provided with the 5th throttle orifice Φ Dp3 and the 6th throttle orifice Φ Dt3 respectively at A mouth and B mouth place, this kind set-up mode makes more flexible for the adjusting of communicated cavity pressure.The throttle orifice that is provided with in the foregoing also can be other throttle structures, and throttle structure is located on in-line and the oil circuit, and the latus rectum of throttle structure is than little the getting final product of pipeline drift diameter of in-line, oil circuit.Such as all can realizing throttling function in the set inside valve piece hole of repairing selector valve or tiny oil duct, the set inside of repairing selector valve can also make pipeline connect more simple, structure is more compact.
In addition; Also have controller and connected dead-centre position Detecting element; The dead-centre position Detecting element detects the signal that an oil cylinder piston arrives a dead-centre position at least, because each oil cylinder all has two dead-centre positions, this scheme requires to detect at least at least one dead-centre position of two oil cylinders; Dead-centre position Detecting element shown in Fig. 4 is sensor; And be located at the rodless cavity place of first oil cylinder, the 21 rod chamber places and second oil cylinder 22 respectively, in order to top dead center position and the bottom dead center position of second oil cylinder 22, i.e. the top dead center position sensor 212 and bottom dead center position sensor 222 that detects first oil cylinder 21.When piston moved to the dead-centre position place, sensor output signal certainly, also can adopt other Detecting elements commonly used to controller.Controller is set the repairing time; And according to rodless cavity connection, rod chamber connection pattern and the corresponding repairing selector valve switching position of dead-center position of piston SC sigmal control; So that two corresponding repairing mouths are communicated with in-line, oil circuit respectively, after the repairing time, break off two repairing mouths and in-line, oil circuit.
With Fig. 4 is example, and for rodless cavity is communicated with mode of operation, the repairing process is following: from the rod chamber oil-feed of second oil cylinder 22; When no bar communicated cavity oil mass was too much, controller was received the induced signal of top dead center position sensor 212 earlier, and controller is controlled 241 switching-overs of the first repairing selector valve; The first rodless cavity repairing mouth 213 and the second rodless cavity repairing mouth 223 are communicated with oil circuit and in-line respectively; At this moment, the pressure in the no bar communicated cavity is greater than Pr, based on the equilibrium response of hydraulic pressure half-bridge; Oil inlet quantity will be less than recirculating oil quantity; Unnecessary hydraulic oil can be back to fuel tank, equally also has certain effect of changing oil, and second piston 221 of second oil cylinder 22 can continue to be displaced downwardly to the lower dead center place; Leak when no bar communicated cavity oil mass and to cause when very few; Controller is received the induced signal of bottom dead center position sensor 222 earlier, and controller is controlled 241 switching-overs of the first repairing selector valve, and the first rodless cavity repairing mouth 213 and the second rodless cavity repairing mouth 223 are communicated with oil circuit and in-line respectively; Pressure in the no bar communicated cavity is less than Pr; Based on the equilibrium response of hydraulic pressure half-bridge, oil inlet quantity will be greater than recirculating oil quantity, thereby repairing is to communicated cavity; Also can play simultaneously the effect (oil inlet quantity is greater than recirculating oil quantity, and the part oil mass exchanges) of changing oil; When no bar communicated cavity oil mass is moderate; Controller is received the signal of bottom dead center position sensor 222 and top dead center position sensor 212 simultaneously; After controller is controlled 241 switching-overs of the first repairing selector valve; Pressure in the no bar communicated cavity and Pr about equally, oil inlet quantity and oil pump capacity mainly play the effect of changing oil also about equally.After 241 switching-overs of the first repairing selector valve; Switching position after the repairing time; Break off the first rodless cavity repairing mouth 213 and the second rodless cavity repairing mouth 223 and in-line, oil circuit; Repairing (also can be draining or change oil) finishes, and this repairing time can be confirmed or obtains through theoretical calculation according to experiment.
Fig. 6 illustrates the first rod chamber repairing mouth 214 and the second rod chamber repairing mouth 224, and the second repairing selector valve 242, second main reversing valve 232.Under rod chamber connection pattern, the repairing process is identical with rodless cavity connection pattern principle, no longer repeats to discuss.
In this embodiment; Two oil cylinders only are provided with the sensor that detects an oil cylinder top dead center position, another oil cylinder bottom dead center position respectively; This kind set-up mode makes hydraulic system be communicated with under pattern or the rod chamber connection pattern at rodless cavity, leaks or oil mass is crossed multimode no matter be in the communicated cavity, and controller all can receive the signal of sensor; Thereby only be the unlatching of may command repairing selector valve according to the dead-centre position signal; Realize repairing, draining and the function of changing oil, can expect, the sensor that detects two oil cylinder top dead center positions, bottom dead center position simultaneously can also be set; Certainly, it is more simple the structure of a top dead center position sensor 212 and a bottom dead center position sensor 222 only to be set.In fact, the sensor that detects two oil cylinder piston bottom dead center positions and detection top dead center position simultaneously is set can achieves the above object equally, but this kind set-up mode structure is comparatively complicated, its simplification is inferior to the foregoing description on control strategy.
This shows; This embodiment; Through the pressure of hydraulic pressure half-bridge with the adjusting communicated cavity; Carry out communicated cavity deep fat and the exchange of fuel tank cold oil in the time of with the realization normal commutation, i.e. the oil mass of repairing, draining is controlled through the hydraulic pressure half-bridge automatically, changes the inconsistent problem of two oil cylinder strokes that is caused thereby compensate the communicated cavity oil mass automatically.On this basis, this embodiment is located at the non-piston stroke place on the oil cylinder with the repairing mouth, and then piston is in running; Can not produce scraping with the repairing mouth, the operation of piston is more smooth and easy, compared to existing technology; Wearing and tearing are able to effective reduction, are able to working life prolong.
In addition, be provided with two repairing selector valves in the above-mentioned mode of execution, in fact; When the sensor that detects top dead center position and bottom dead center position simultaneously is set; Also can be for each repairing mouth is provided with corresponding selector valve respectively, such as two two position two-way valves that are communicated with in-line and oil circuit respectively, when two oil cylinders all have the dead-centre position induced signal; Two selector valves are all connected with oil circuit, realize changing oil; When only receiving a sensor signal, identical with above-mentioned judgement communicated cavity oil liquid leakage or too much judgement principle, can only connect a selector valve and in-line or oil circuit, realize the only import but no export or the only export but no import of hydraulic oil, to realize repairing or draining.
The repairing selector valve preferably adopts three position four-way directional control valve in this embodiment, and is as shown in Figure 4, and first main reversing valve 231 gets current potential when right position, and the 22 rod chamber oil-feeds of second oil cylinder then make the first repairing selector valve 241 get current potential in right; First main reversing valve 231 gets current potential when position, a left side; The 21 rod chamber oil-feeds of first oil cylinder; Then make the first repairing selector valve 241 get the electric position, a left side that is in, then the repairing oil circuit is in following current (with respect to the mobile direction of the hydraulic oil between the two oil cylinder communicated cavitys) state all the time, and repairing, draining or the effect of changing oil are better.Certainly, the repairing selector valve also can adopt two-position four-way valve, during an oil cylinder oil-feed, and the following current of repairing oil circuit, during another oil cylinder oil-feed, repairing oil circuit adverse current also can realize the basic purpose of this programme; In addition, when the repairing selector valve is two-position four-way valve, can realize that also the repairing oil circuit is in the following current state all the time, promptly controller can be controlled repairing selector valve sex work at interval, and during following current, the repairing selector valve is opened, and during adverse current, the repairing selector valve keeps shut.The working principle of second main reversing valve 232, the second repairing selector valve 242 is identical with above-mentioned principle among Fig. 6.
To the foregoing description, the repairing mouth can be located at the end of oil cylinder, compared to existing technology, can improve the intensity of oil cylinder.
In addition, in the foregoing description, on two oil cylinders, be provided with the repairing mouth of corresponding rod chamber communicated cavity and rodless cavity communicated cavity; In fact; One rod chamber repairing mouth is set on two oil cylinders altogether, and a rodless cavity repairing mouth also can be realized the purpose of repairing or draining; Can be referring to Fig. 7, this rod chamber repairing mouth or rodless cavity repairing mouth directly are communicated with the Pr place get final product.Certainly, on two oil cylinders, be provided with bar chamber repairing mouth and rodless cavity repairing mouth, in repairing or draining, can also play the effect of changing oil preferably, prevent that communicated cavity oil temperature is too high.Can expect; Rod chamber repairing mouth only is set or rodless cavity repairing mouth only is set and all can be implemented in repairing, the draining under the relevant work pattern and the function of changing oil; Rod chamber repairing mouth and rodless cavity repairing mouth are set simultaneously; Can make that no matter this oil-supplementing system works, and all can realize good repairing, draining and the function of changing oil under rod chamber connection pattern still is rodless cavity connection pattern.
The invention still further relates to a kind of pumping mechanism and engineering machinery; Pumping mechanism has the pumps hydraulic system; With pumping cylinder by the pumps hydraulic system drive, be provided with the described pumps hydraulic oil-supplementing system of above-mentioned arbitrary embodiment in the said pumps hydraulic system, engineering machinery has described pumping mechanism.Because above-mentioned pumps hydraulic oil-supplementing system has above-mentioned technique effect, the pumping mechanism with this pumps hydraulic oil-supplementing system also has identical technique effect with engineering machinery, does not give unnecessary details at this.
More than a kind of engineering machinery provided by the present invention and pumping mechanism thereof, pumps hydraulic oil-supplementing system have been carried out detailed introduction.Used concrete example among this paper principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. a pumps hydraulic oil-supplementing system has two oil cylinders that can under rod chamber connection pattern, work, and two said oil cylinders all have two dead-centre positions of piston; It is characterized in that also having:
Non-piston stroke place corresponding with rod chamber at least one said oil cylinder is provided with rod chamber repairing mouth;
The repairing selector valve, said rod chamber repairing mouth is through said repairing selector valve and in-line and oil circuit realization break-make; Be equipped with throttle structure on said in-line and the said oil circuit;
Controller and connected dead-centre position Detecting element, said dead-centre position Detecting element detect the signal of piston arrives one dead-centre position of an oil cylinder at least; Said controller is set the repairing time; And according to the testing signal of dead-centre position Detecting element; Control said repairing selector valve switching position after at least one piston moves to dead-centre position; So that said rod chamber repairing mouth is communicated with in-line and oil circuit, switching position after the repairing time is so that said rod chamber repairing mouth and in-line and oil circuit disconnection.
2. pumps hydraulic oil-supplementing system according to claim 1 is characterized in that, is equipped with said rod chamber repairing mouth on the two said oil cylinders, and two said rod chamber repairing mouths are communicated with in-line and oil circuit respectively through said repairing selector valve or break off.
3. pumps hydraulic oil-supplementing system according to claim 2 is characterized in that, said repairing selector valve is a three position four-way directional control valve.
4. pumps hydraulic oil-supplementing system according to claim 3 is characterized in that, four oil ports of said repairing selector valve are equipped with throttle structure.
5. a pumps hydraulic oil-supplementing system has two oil cylinders that can under rodless cavity connection pattern, work, and two said oil cylinders all have two dead-centre positions of piston; It is characterized in that also having:
Non-piston stroke place corresponding with rodless cavity at least one said oil cylinder is provided with rodless cavity repairing mouth;
The repairing selector valve, said rodless cavity repairing mouth is through said repairing selector valve and in-line and oil circuit realization break-make; Be equipped with throttle structure on said in-line and the said oil circuit;
Controller and connected dead-centre position Detecting element, said dead-centre position Detecting element detect the signal of piston arrives one dead-centre position of an oil cylinder at least; Said controller is set the repairing time; And according to the testing signal of dead-centre position Detecting element; Said repairing selector valve switching position after at least one piston moves to dead-centre position that control is corresponding; So that said rodless cavity repairing mouth is communicated with in-line and oil circuit, switching position after the repairing time is so that said rodless cavity repairing mouth and in-line and oil circuit disconnection.
6. pumps hydraulic oil-supplementing system according to claim 5 is characterized in that, is equipped with said rodless cavity repairing mouth on the two said oil cylinders, and two said rodless cavity repairing mouths are communicated with in-line and oil circuit respectively through said repairing selector valve or break off.
7. pumps hydraulic oil-supplementing system according to claim 6 is characterized in that, said repairing selector valve is a three position four-way directional control valve.
8. pumps hydraulic oil-supplementing system according to claim 7 is characterized in that, four oil ports of said repairing selector valve are equipped with throttle structure.
9. pumping mechanism has the pumps hydraulic system and by the pumping cylinder of said pumps hydraulic system drive, it is characterized in that, is provided with like each described pumps hydraulic oil-supplementing system of claim 1 to 8 in the said pumps hydraulic system.
10. an engineering machinery is characterized in that, has pumping mechanism as claimed in claim 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100366979A CN102562712A (en) | 2012-02-17 | 2012-02-17 | Engineering machinery, pumping mechanism thereof and pumping hydraulic oil replenishing system |
| CN 201210243916 CN102734263B (en) | 2012-02-17 | 2012-07-13 | Engineering machine and pumping mechanism thereof as well as pumping hydraulic oil supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100366979A CN102562712A (en) | 2012-02-17 | 2012-02-17 | Engineering machinery, pumping mechanism thereof and pumping hydraulic oil replenishing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102562712A true CN102562712A (en) | 2012-07-11 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100366979A Withdrawn CN102562712A (en) | 2012-02-17 | 2012-02-17 | Engineering machinery, pumping mechanism thereof and pumping hydraulic oil replenishing system |
| CN 201210243916 Active CN102734263B (en) | 2012-02-17 | 2012-07-13 | Engineering machine and pumping mechanism thereof as well as pumping hydraulic oil supply system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210243916 Active CN102734263B (en) | 2012-02-17 | 2012-07-13 | Engineering machine and pumping mechanism thereof as well as pumping hydraulic oil supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN102562712A (en) |
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| CN103590996A (en) * | 2013-11-22 | 2014-02-19 | 中联重科股份有限公司 | Pumping equipment and pumping method |
| CN106194881A (en) * | 2016-09-20 | 2016-12-07 | 徐州徐工施维英机械有限公司 | Directional control valve group and hydraulic system |
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| CN108518386A (en) * | 2018-05-09 | 2018-09-11 | 中山市智泰机电科技有限公司 | A kind of cushion cylinder |
| CN110451448A (en) * | 2018-05-07 | 2019-11-15 | 成都安好精工机械股份有限公司 | A kind of automatic oil supply machine of hydraulic tappet |
| CN112855483A (en) * | 2021-01-04 | 2021-05-28 | 中联重科股份有限公司 | Pumping equipment and control device and control method thereof |
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| WO2005028166A1 (en) * | 2003-09-22 | 2005-03-31 | Matsushita Electric Industrial Co., Ltd. | Device and method for controlling elastic-body actuator |
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- 2012-02-17 CN CN2012100366979A patent/CN102562712A/en not_active Withdrawn
- 2012-07-13 CN CN 201210243916 patent/CN102734263B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103590996A (en) * | 2013-11-22 | 2014-02-19 | 中联重科股份有限公司 | Pumping equipment and pumping method |
| CN103590996B (en) * | 2013-11-22 | 2015-08-26 | 中联重科股份有限公司 | Pumping equipment and pumping method |
| CN106194881A (en) * | 2016-09-20 | 2016-12-07 | 徐州徐工施维英机械有限公司 | Directional control valve group and hydraulic system |
| CN107138603A (en) * | 2017-06-29 | 2017-09-08 | 奇瑞汽车股份有限公司 | Hydraulic pressure side blow aperture apparatus |
| CN107138603B (en) * | 2017-06-29 | 2019-12-03 | 奇瑞汽车股份有限公司 | Hydraulic side blow aperture apparatus |
| CN110451448A (en) * | 2018-05-07 | 2019-11-15 | 成都安好精工机械股份有限公司 | A kind of automatic oil supply machine of hydraulic tappet |
| CN108518386A (en) * | 2018-05-09 | 2018-09-11 | 中山市智泰机电科技有限公司 | A kind of cushion cylinder |
| CN108518386B (en) * | 2018-05-09 | 2024-04-26 | 中山市智泰机电科技有限公司 | Buffer oil cylinder |
| CN112855483A (en) * | 2021-01-04 | 2021-05-28 | 中联重科股份有限公司 | Pumping equipment and control device and control method thereof |
| CN112855483B (en) * | 2021-01-04 | 2022-03-22 | 中联重科股份有限公司 | Pumping equipment and control device and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102734263B (en) | 2013-04-10 |
| CN102734263A (en) | 2012-10-17 |
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Open date: 20120711 |